Manufacture of explosives



UNITED STATES PATENT OFFICE.

GUIDO ALFONS HEDBERG, OF ALINGSAS, SWEDEN.

MANUFACTURE OF EXPLOSIVES.

No Drawing.

To all vr/mm. it may on ern:

Be it known that l, Giulio Anions lino- Bmm, a subject of the King oiSweden, residing at Alingsiis. in the ounty of .\lf! berg and Kingdom ofSweden, have in vented new and useful Improvements in the Manufacture ofEx wlosives. of which the following is a specification.

This invention refers to an improvement in the manufacture ofexplosives.

In the manufacture of gelatinized explosives it is known to mix incork-powder or similar substances so that the air contained in the cellsof the said aggregates may increase the detonating effect of theexplosive. Said substances however are diflicult to procure particularlyin places, where the are not to he found as natural. products. it hasalso appeared that the said aggregates are not adapted to powder shapedexplo- Sives now more and more usual, such as nitrate of ammonia orsimilar, where it is proved fit to bed intimately the explosive pro )erinto a protecting covering.

. l his invention is a result of experiments to find some aggregatesmore suitable than those hitherto known. It has namely appeared, thatfine-ground meal of pine-bark as an aggregate. especially in powdershaped or granular explosives, gives the same a particularly increasedeffect as also a greater ability to endure storing without losing inexplosive effect by taking up moisture. This good effect of the meal ofpine-bark appears still more evident, if to the meal of the pine-bark isadded some per cent. meal Specification of Letters Patent.

Application filed September 9. 1919.

Patented Apr. 6, 1920.

Serial No. 322,715. v

of pine-corms, which per cent. however may vary within rather extensivelimits, viz., be tween (MC; and 20%- The g()()(l effect of the meal offine-hark and the meal of pine-cones on t e explo sives may be ascribedto their percentage of resin or incrusted substances.

'hen manufacturing an explosive in acvordance with this invention theexplosive material is thorough]; mixed with the meal of the pine-bark,intermin 'led with meal of cones, so that the grains 0 the granularexplosives are caused to he intimately embedded within the bark andcone-meal.

Having thus particularlydescribed and ascertained thenature of my saidinvention and how the same is to he performed I declare. that what Iclaim is:

i. In explosives. in combination with the explosive materials proper,meal of pine hark and meal of pine-cones as an intimate mixture.

2. Explosives as claimed in claim 1 the quantity of cone-mealrepresenting 0.5 up to 20 per cent. of the meal of pinehark.

3. An improved method (if/manufacture of explosiv s, characterized.therein, that granular explosives are thoroughly mixed with aggregatesof meal of pine-hark and meal of pine-cones, so that the explosivegrains are caused to he intimately embedded in the barlmneal andcone-meal.

In testimony Whereoi I have aflixed my signature.

GUIDO ALFONS HEDBERG

